| 摘要 |
PROBLEM TO BE SOLVED: To provide a cube corner retroreflecting sheet of a triangular pyramid type which has watermarks having directivity attached, is improved in appearance and reflection performance and further, is improved in the weatherability of the design. SOLUTION: The retroreflector provided with the design having the directivity comprises at least a cube corner type retroreflecting element layer, one or more back layers provided on the under surface of the retroreflecting element layer, an air layer provided between the retroreflecting element layer and the back layer, and a design layer. The design layer is disposed on any surface of the back layers. The design provided on the retroreflector is thereby provided with an invisible observation angle range. COPYRIGHT: (C)2004,JPO
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